DS1557P 查看數據表（PDF） - Maxim Integrated
零件编号
产品描述 (功能)
生产厂家
DS1557P Datasheet PDF : 17 Pages
| |||
DS1557 4Meg, Nonvolatile, Y2K-Compliant Timekeeping RAM
CLOCK OPERATIONS
Table 2 and the following paragraphs describe the operation of RTC, alarm, and watchdog functions.
Table 2. Register Map
ADDRESS
7FFFFh
7FFFEh
7FFFDh
7FFFCh
7FFFBh
7FFFAh
7FFF9h
7FFF8h
7FFF7h
7FFF6h
7FFF5h
7FFF4h
7FFF3h
7FFF2h
7FFF1h
7FFF0h
B7
X
X
X
X
X
OSC
W
WDS
AE
AM4
AM3
AM2
AM1
Y
WF
DATA
B6
B5
B4
B3
B2
B1
B0
10 Year
Year
X
X
10
Month
Month
X
10 Date
Date
FT
X
X
X
Day
X
10 Hour
Hour
10 Minutes
Minutes
10 Seconds
Seconds
R
10 Century
Century
BMB4 BMB3 BMB2 BMB1 BMB0 RB1 RB0
Y
Abe
Y
Y
Y
YY
Y
10 Date
Date
Y
10 Hours
Hours
10 Minutes
Minutes
10 Seconds
Seconds
Y
Y
Y
Y
Y
YY
AF
0
BLF
0
0
00
FUNCTION/RANGE
Year
Month
Date
Day
Hour
Minutes
Seconds
Control
Watchdog
Interrupts
Alarm Date
Alarm Hours
Alarm Minutes
Alarm Seconds
Unused
Flags
00-99
01-12
01-31
01-07
00-23
00-59
00-59
00-39
01-31
00-23
00-59
00-59
X = Unused, Read/Writeable Under Write and Read Bit Control
Y = Unused, Read/Writeable Without Write and Read Bit Control
OSC = Oscillator Start/Stop Bit
W = Write Bit
R = Read Bit
WDS = Watchdog Steering Bit
BMB0 to BMB4 = Watchdog Multiplier Bits
RB0 to RB1 = Watchdog Resolution Bits
AE = Alarm Flag Enable
FT = Frequency Test Bit
ABE = Alarm in Battery-BackUp Mode Enable
AM1 to AM4 = Alarm Mask Bits
WF = Watchdog Flag
AF = Alarm Flag
0 = 0 (Read Only)
BLF = Battery Low Flag
5 of 17
Share Link: 